Hank gives the run down on the top five ways humans are negatively impacting the environment and having detrimental effects on the valuable ecosystem services which a healthy biosphere provides.

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Table of Contents
Ecosystem Services 00:51
The Importance of Biodiversity 04:07
Deforestation 06:42
Desertification 06:49
Global Warming 07:59
Invasive Species 08:51
Overharvesting 09:20

Crash Course/SciShow videos referenced in this episode:
Hydrologic and Carbon Cycles: http://www.youtube.com/watch?v=2D7hZpIYlCA
Nitrogen and Phosphorus Cycles: http://www.youtube.com/watch?v=leHy-Y_8nRs
Ecological Succession: http://www.youtube.com/watch?v=jZKIHe2LDP8
Climate Change: http://www.youtube.com/watch?v=M2Jxs7lR8ZI
Invasive Species: http://www.youtube.com/watch?v=eDOwTXobJ3k
Food Shortage: http://www.youtube.com/watch?v=bPLJP84xL9A

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